In the parlance of counterterrorism, “links to suspected terrorist” is the weakest designation. It could be the referee was at a party or event that was being surveilled because of other attendees. It means nothing.
BREAKING: Trump administration claims the Somali referee was denied entry because he is a security threat to the US with links to suspected terrorists. He was questioned for 11 hours, including about Al Shabab
Omar Abdulkadir Artan just landed back in Somalia to a hero's welcome